"""
Implementation of the acutal database accesses for forward search.
"""
-from typing import List, Tuple, AsyncIterator, Dict, Any
+from typing import List, Tuple, AsyncIterator, Dict, Any, Callable
import abc
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import ARRAY, array_agg
from nominatim.typing import SaFromClause, SaScalarSelect, SaColumn, \
- SaExpression, SaSelect, SaRow
+ SaExpression, SaSelect, SaLambdaSelect, SaRow, SaBind
from nominatim.api.connection import SearchConnection
from nominatim.api.types import SearchDetails, DataLayer, GeometryFormat, Bbox
import nominatim.api.results as nres
'countries': details.countries}
-LIMIT_PARAM = sa.bindparam('limit')
-MIN_RANK_PARAM = sa.bindparam('min_rank')
-MAX_RANK_PARAM = sa.bindparam('max_rank')
-VIEWBOX_PARAM = sa.bindparam('viewbox', type_=Geometry)
-VIEWBOX2_PARAM = sa.bindparam('viewbox2', type_=Geometry)
-NEAR_PARAM = sa.bindparam('near', type_=Geometry)
-NEAR_RADIUS_PARAM = sa.bindparam('near_radius')
-EXCLUDED_PARAM = sa.bindparam('excluded')
-COUNTRIES_PARAM = sa.bindparam('countries')
+LIMIT_PARAM: SaBind = sa.bindparam('limit')
+MIN_RANK_PARAM: SaBind = sa.bindparam('min_rank')
+MAX_RANK_PARAM: SaBind = sa.bindparam('max_rank')
+VIEWBOX_PARAM: SaBind = sa.bindparam('viewbox', type_=Geometry)
+VIEWBOX2_PARAM: SaBind = sa.bindparam('viewbox2', type_=Geometry)
+NEAR_PARAM: SaBind = sa.bindparam('near', type_=Geometry)
+NEAR_RADIUS_PARAM: SaBind = sa.bindparam('near_radius')
+COUNTRIES_PARAM: SaBind = sa.bindparam('countries')
+
+def _within_near(t: SaFromClause) -> Callable[[], SaExpression]:
+ return lambda: t.c.geometry.ST_DWithin(NEAR_PARAM, NEAR_RADIUS_PARAM)
+
+def _exclude_places(t: SaFromClause) -> Callable[[], SaExpression]:
+ return lambda: t.c.place_id.not_in(sa.bindparam('excluded'))
def _select_placex(t: SaFromClause) -> SaSelect:
return sa.select(t.c.place_id, t.c.osm_type, t.c.osm_id, t.c.name,
t.c.geometry.ST_Expand(0).label('bbox'))
-def _add_geometry_columns(sql: SaSelect, col: SaColumn, details: SearchDetails) -> SaSelect:
- if not details.geometry_output:
- return sql
-
+def _add_geometry_columns(sql: SaLambdaSelect, col: SaColumn, details: SearchDetails) -> SaSelect:
out = []
if details.geometry_simplification > 0.0:
for n in numerals)))
if details.excluded:
- sql = sql.where(table.c.place_id.not_in(EXCLUDED_PARAM))
+ sql = sql.where(_exclude_places(table))
return sql.scalar_subquery()
t = conn.t.placex
sql = _select_placex(t).where(t.c.place_id.in_(place_ids))
- sql = _add_geometry_columns(sql, t.c.geometry, details)
+ if details.geometry_output:
+ sql = _add_geometry_columns(sql, t.c.geometry, details)
for row in await conn.execute(sql):
result = nres.create_from_placex_row(row, nres.SearchResult)
# radius for the lookup.
sql = sql.join(table, t.c.place_id == table.c.place_id)\
.join(tgeom,
- sa.case((sa.and_(tgeom.c.rank_address < 9,
- tgeom.c.geometry.is_area()),
- tgeom.c.geometry.ST_Contains(table.c.centroid)),
- else_ = tgeom.c.centroid.ST_DWithin(table.c.centroid, 0.05)))\
+ table.c.centroid.ST_CoveredBy(
+ sa.case((sa.and_(tgeom.c.rank_address < 9,
+ tgeom.c.geometry.is_area()),
+ tgeom.c.geometry),
+ else_ = tgeom.c.centroid.ST_Expand(0.05))))\
.order_by(tgeom.c.centroid.ST_Distance(table.c.centroid))
sql = sql.where(t.c.rank_address.between(MIN_RANK_PARAM, MAX_RANK_PARAM))
if details.countries:
sql = sql.where(t.c.country_code.in_(COUNTRIES_PARAM))
if details.excluded:
- sql = sql.where(t.c.place_id.not_in(EXCLUDED_PARAM))
+ sql = sql.where(_exclude_places(t))
if details.layers is not None:
sql = sql.where(_filter_by_layer(t, details.layers))
if details.near and details.near_radius is not None and details.near_radius < 0.2:
# simply search in placex table
- sql = _select_placex(t) \
- .where(t.c.linked_place_id == None) \
- .where(t.c.geometry.ST_DWithin(NEAR_PARAM, NEAR_RADIUS_PARAM)) \
- .order_by(t.c.centroid.ST_Distance(NEAR_PARAM))
+ def _base_query() -> SaSelect:
+ return _select_placex(t) \
+ .where(t.c.linked_place_id == None) \
+ .where(t.c.geometry.ST_DWithin(NEAR_PARAM, NEAR_RADIUS_PARAM)) \
+ .order_by(t.c.centroid.ST_Distance(NEAR_PARAM)) \
+ .limit(LIMIT_PARAM)
+
+ classtype = self.categories.values
+ if len(classtype) == 1:
+ cclass, ctype = classtype[0]
+ sql: SaLambdaSelect = sa.lambda_stmt(lambda: _base_query()
+ .where(t.c.class_ == cclass)
+ .where(t.c.type == ctype))
+ else:
+ sql = _base_query().where(sa.or_(*(sa.and_(t.c.class_ == cls, t.c.type == typ)
+ for cls, typ in classtype)))
if self.countries:
sql = sql.where(t.c.country_code.in_(self.countries.values))
if details.viewbox is not None and details.bounded_viewbox:
sql = sql.where(t.c.geometry.intersects(VIEWBOX_PARAM))
- classtype = self.categories.values
- if len(classtype) == 1:
- sql = sql.where(t.c.class_ == classtype[0][0]) \
- .where(t.c.type == classtype[0][1])
- else:
- sql = sql.where(sa.or_(*(sa.and_(t.c.class_ == cls, t.c.type == typ)
- for cls, typ in classtype)))
-
- sql = sql.limit(LIMIT_PARAM)
rows.extend(await conn.execute(sql, bind_params))
else:
# use the class type tables
"""
t = conn.t.placex
+ ccodes = self.countries.values
sql = _select_placex(t)\
- .where(t.c.country_code.in_(self.countries.values))\
+ .where(t.c.country_code.in_(ccodes))\
.where(t.c.rank_address == 4)
- sql = _add_geometry_columns(sql, t.c.geometry, details)
+ if details.geometry_output:
+ sql = _add_geometry_columns(sql, t.c.geometry, details)
if details.excluded:
- sql = sql.where(t.c.place_id.not_in(EXCLUDED_PARAM))
+ sql = sql.where(_exclude_places(t))
if details.viewbox is not None and details.bounded_viewbox:
- sql = sql.where(t.c.geometry.intersects(VIEWBOX_PARAM))
+ sql = sql.where(lambda: t.c.geometry.intersects(VIEWBOX_PARAM))
if details.near is not None and details.near_radius is not None:
- sql = sql.where(t.c.geometry.ST_DWithin(NEAR_PARAM, NEAR_RADIUS_PARAM))
+ sql = sql.where(_within_near(t))
results = nres.SearchResults()
for row in await conn.execute(sql, _details_to_bind_params(details)):
if details.viewbox is not None and details.bounded_viewbox:
sql = sql.where(tgrid.c.geometry.intersects(VIEWBOX_PARAM))
if details.near is not None and details.near_radius is not None:
- sql = sql.where(tgrid.c.geometry.ST_DWithin(NEAR_PARAM, NEAR_RADIUS_PARAM))
+ sql = sql.where(_within_near(tgrid))
sub = sql.subquery('grid')
""" Find results for the search in the database.
"""
t = conn.t.postcode
+ pcs = self.postcodes.values
sql = sa.select(t.c.place_id, t.c.parent_place_id,
t.c.rank_search, t.c.rank_address,
t.c.postcode, t.c.country_code,
t.c.geometry.label('centroid'))\
- .where(t.c.postcode.in_(self.postcodes.values))
+ .where(t.c.postcode.in_(pcs))
- sql = _add_geometry_columns(sql, t.c.geometry, details)
+ if details.geometry_output:
+ sql = _add_geometry_columns(sql, t.c.geometry, details)
penalty: SaExpression = sa.literal(self.penalty)
if details.near is not None:
if details.near_radius is not None:
- sql = sql.where(t.c.geometry.ST_DWithin(NEAR_PARAM, NEAR_RADIUS_PARAM))
+ sql = sql.where(_within_near(t))
sql = sql.order_by(t.c.geometry.ST_Distance(NEAR_PARAM))
if self.countries:
sql = sql.where(t.c.country_code.in_(self.countries.values))
if details.excluded:
- sql = sql.where(t.c.place_id.not_in(EXCLUDED_PARAM))
+ sql = sql.where(_exclude_places(t))
if self.lookups:
assert len(self.lookups) == 1
details: SearchDetails) -> nres.SearchResults:
""" Find results for the search in the database.
"""
- t = conn.t.placex.alias('p')
- tsearch = conn.t.search_name.alias('s')
+ t = conn.t.placex
+ tsearch = conn.t.search_name
- sql = sa.select(t.c.place_id, t.c.osm_type, t.c.osm_id, t.c.name,
- t.c.class_, t.c.type,
- t.c.address, t.c.extratags,
- t.c.housenumber, t.c.postcode, t.c.country_code,
- t.c.wikipedia,
- t.c.parent_place_id, t.c.rank_address, t.c.rank_search,
- t.c.centroid,
- t.c.geometry.ST_Expand(0).label('bbox'))\
- .where(t.c.place_id == tsearch.c.place_id)
+ sql: SaLambdaSelect = sa.lambda_stmt(lambda:
+ sa.select(t.c.place_id, t.c.osm_type, t.c.osm_id, t.c.name,
+ t.c.class_, t.c.type,
+ t.c.address, t.c.extratags,
+ t.c.housenumber, t.c.postcode, t.c.country_code,
+ t.c.wikipedia,
+ t.c.parent_place_id, t.c.rank_address, t.c.rank_search,
+ t.c.centroid,
+ t.c.geometry.ST_Expand(0).label('bbox'))
+ .where(t.c.place_id == tsearch.c.place_id))
- sql = _add_geometry_columns(sql, t.c.geometry, details)
+ if details.geometry_output:
+ sql = _add_geometry_columns(sql, t.c.geometry, details)
penalty: SaExpression = sa.literal(self.penalty)
for ranking in self.rankings:
# if a postcode is given, don't search for state or country level objects
sql = sql.where(tsearch.c.address_rank > 9)
tpc = conn.t.postcode
+ pcs = self.postcodes.values
if self.expected_count > 1000:
# Many results expected. Restrict by postcode.
sql = sql.where(sa.select(tpc.c.postcode)
- .where(tpc.c.postcode.in_(self.postcodes.values))
+ .where(tpc.c.postcode.in_(pcs))
.where(tsearch.c.centroid.ST_DWithin(tpc.c.geometry, 0.12))
.exists())
# Less results, only have a preference for close postcodes
pc_near = sa.select(sa.func.min(tpc.c.geometry.ST_Distance(tsearch.c.centroid)))\
- .where(tpc.c.postcode.in_(self.postcodes.values))\
+ .where(tpc.c.postcode.in_(pcs))\
.scalar_subquery()
- penalty += sa.case((t.c.postcode.in_(self.postcodes.values), 0.0),
+ penalty += sa.case((t.c.postcode.in_(pcs), 0.0),
else_=sa.func.coalesce(pc_near, 2.0))
if details.viewbox is not None:
hnr_regexp = f"\\m({'|'.join(self.housenumbers.values)})\\M"
sql = sql.where(tsearch.c.address_rank.between(16, 30))\
.where(sa.or_(tsearch.c.address_rank < 30,
- t.c.housenumber.op('~*')(hnr_regexp)))
+ t.c.housenumber.op('~*')(hnr_regexp)))
# Cross check for housenumbers, need to do that on a rather large
# set. Worst case there are 40.000 main streets in OSM.
.where(thnr.c.indexed_status == 0)
if details.excluded:
- place_sql = place_sql.where(thnr.c.place_id.not_in(EXCLUDED_PARAM))
+ place_sql = place_sql.where(_exclude_places(thnr))
if self.qualifiers:
place_sql = place_sql.where(self.qualifiers.sql_restrict(thnr))
numerals = [int(n) for n in self.housenumbers.values if n.isdigit()]
- interpol_sql: SaExpression
- tiger_sql: SaExpression
+ interpol_sql: SaColumn
+ tiger_sql: SaColumn
if numerals and \
(not self.qualifiers or ('place', 'house') in self.qualifiers.values):
# Housenumbers from interpolations
numerals, details)
), else_=None)
else:
- interpol_sql = sa.literal_column('NULL')
- tiger_sql = sa.literal_column('NULL')
+ interpol_sql = sa.null()
+ tiger_sql = sa.null()
unsort = sa.select(inner, place_sql.scalar_subquery().label('placex_hnr'),
interpol_sql.label('interpol_hnr'),
if self.qualifiers:
sql = sql.where(self.qualifiers.sql_restrict(t))
if details.excluded:
- sql = sql.where(tsearch.c.place_id.not_in(EXCLUDED_PARAM))
+ sql = sql.where(_exclude_places(tsearch))
if details.min_rank > 0:
sql = sql.where(sa.or_(tsearch.c.address_rank >= MIN_RANK_PARAM,
tsearch.c.search_rank >= MIN_RANK_PARAM))
projects / nominatim.git / blobdiff